The maximum number of electrons in a shell is
a. two.
b. four.
c. six.
d. eight.
e. ten.
D
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Which characteristic is typical of a cancer cell but not of a normal cell?
A) Cell division is inhibited when the cell contacts neighboring cells. B) The cell cycle lacks S phase. C) The cell has the ability to invade surrounding tissue. D) Cell death occurs after a limited number of divisions.
The only genes necessary for the retroviral lifecycle are gag and pol
Indicate whether the statement is true or false
Which describes bacteria that require low concentrations of oxygen to survive (less than that in the current atmosphere)?
A) facultative anaerobes B) microaerophiles C) obligate aerobes D) obligate anaerobes
Which of the following organelle is not part of the endomembrane system?
A. endoplasmic reticulum B. Golgi apparatus C. lysome D. peroxisome